| Name | First Aired | Runtime | Image | |
|---|---|---|---|---|
| S04E01 | Diamond Factory, Anthrax Investigation, Auto-Tun |
June 30, 2009
PBS
|
60 | |
| S04E02 | Hunt for Alien Earths, Art Authentication |
July 7, 2009
PBS
|
60 | |
| S04E03 | Marathon Mouse, Dinosaur Plague |
July 14, 2009
PBS
|
60 | |
| S04E04 | Picky Eaters, Capturing Carbon, Sea Lions and Walruses |
July 21, 2009
PBS
|
60 | |
| S04E05 | Moon Smasher, Secrets in the Salt, Bird Brains |
July 28, 2009
PBS
|
60 | |
| S04E06 | Public Genomes, Algae Fuel, Arctic Ocean Seafloor |
August 18, 2009
PBS
|
60 | |
| S04E07 | Saving Hubble Update, Gangster Birds |
August 25, 2009
PBS
|
60 | |
| S04E08 |
Sleep, First Primates, Earthquakes in the Midwest
season finale
|
September 1, 2009
PBS
|
60 |
No artwork of this type.
No artwork of this type.
